farmmamba created HDFS-17694:
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             Summary: RBF:Make get datanodes reports configurable.
                 Key: HDFS-17694
                 URL: https://issues.apache.org/jira/browse/HDFS-17694
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: farmmamba
            Assignee: farmmamba


Refer to HDFS-13347.

Since getting the datanode report is an expensive operation and maybe we don't 
need those information in router sometimes, we can make get datanodes reports 
configurable.



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